<!DOCTYPE html>
<html>
<head>
 <title>Info & Tips</title>
 <link rel="stylesheet" href="style.css">
</head>

<body>

<div id="content">
<img src="header_text_5.png" >

<script src="tocgen.js"></script>

<div class="subject-header">Info & Tips</div>

<p>
    This section contains info and tips for different features and edit actions.
</p>

<div id="toc"></div>

<div id="toccontent">

<h3>Filters</h3>
<h4>Compressor</h4>
<p>
    Information on how audio dynamic range compression works, and on meaning and function of parameters in this filter is available in this Wikipedia <a href="https://en.wikipedia.org/wiki/Dynamic_range_compression">article</a>.
</p>
<h4>Perspective</h4>
<p>
    With parameter <b>Sense</b> set to value <b>Destination</b> it is possible to set the corners of image anywhere in the destination image but there is <i>visual glitch</i> with sides of image being stretched, this is a known issue described <a href="https://trac.ffmpeg.org/ticket/8124">here</a>.
</p>
<p>
    The workaround is to add a <b>Crop</b> filter before <b>Perspective</b> filter and cut at least 1 pixel from all sides of the image.
</p>

</div> 
</div>
</body>
</html>
